The NRG Center is a convention center in Houston, Texas, and the eighth largest convention center in the United States. It is part of the NRG Park complex that was constructed around the NRG Astrodome and NRG Stadium. The NRG Center hosts various events year-round, including portions of the Houston Livestock Show and Rodeo, which maintains …The NRG Center is a convention center in Houston, Texas, and the eighth largest convention center in the United States. It is part of the NRG Park complex that was constructed around the NRG Astrodome and NRG Stadium. The NRG Center hosts various events year-round, including portions of the Houston Livestock Show and Rodeo, which maintains its offices on the second floor of the building. The grand opening of the facility was on April 12, 2002, with the Houston Auto Show. Hermes Reed Architects was the architect for the facility.